摘要:
The invention relates to organic photochromic materials consisting of a polymer matrix of optical quality and of at least one dye that imparts photochromic properties to the matrix, the dye being selected from spirooxazines, spiropyrans and chromenes. The polymer constituting the matrix is a copolymer of 30-95 wt.% ethoxylated bisphenol A dimethacrylate and 5-70 wt.% of a polyurethane oligomer having terminal di- or triacrylic or di- or trimethacrylic functionality. Such photochromic materials are most suitable for the production of ophthalmic and sun protection lenses.
摘要:
The present invention has for subjects, novel benzopyran derivatives, substituted in position 2 with an adamantyl group as well as the compositions and (co)polymer matrices containing such derivatives. Said derivatives possess interesting photochromic properties.
摘要:
The invention concerns photochromic compounds with formula (I), in which R1 is an asymmetric aliphatic monocyclic group with formula (II), where 1 = 1-12, and R9 is H or an alkyl, alkoxy, dialkylamino, alkyl ester or CN group with the condition that at least one of the R9 groups is not H, R2-R7 can have a variety of meanings, A represents a (hetero)aromatic ring which can be substituted and n is a whole number. Application to the production of photochromic articles made of organic polymer, notably lenses.
摘要:
The invention relates to novel benzo, naphtho or phenanthrochromene-type compounds which are of the formula (I) given below. These compounds (I) possess interesting photochromic properties. The invention also relates to their preparation, their applications as photochromes as well as to compositions containing them.
摘要:
The invention relates to photochromic compounds of general formula (I), in which: R1-R8 represent various substituents, characterized in that at least two of the groups R3-R6 are C1-C6 alkoxy groups.
摘要:
The invention relates to novel naphthopyrans having a cyclic group annelated in position 6, 7. These naphthopyrans have formula (I). These compounds (I) have advantageous photochromic properties. The invention also covers the method of preparing these naphthopyrans, as well as their applications as photochromes : compositions and (co)polymers matrices comprising them.
摘要:
The invention relates to novel benzo, naphtho or phenanthrochromene-type compounds which are of the formula (I) given below. These compounds (I) possess interesting photochromic properties. The invention also relates to their preparation, their applications as photochromes as well as to compositions containing them.
摘要:
The invention concerns photochromic compounds having formula (I), where R is a polycyclic group formed by at least one alicyclic group linked to, bridged or condensed, with at least one other aliphatic and/or aromatic ring, which rings contain, optionally, at least one heteroatom and/or at least one unsaturation, R -R can have different meanings, A represents a (hetero)aromatic ring which can be substituted and n is a whole number. Preferably, R is an asymmetric bicyclic group such as a norbornyl group. Application to the production of photochromic articles of organic polymers, notably lenses.
摘要:
The present invention has for subjects novel compounds of the (benzofuran)naphthopyran type as well as the compositions and (co)polymer matrices containing them. Said compounds possess interesting photochromic properties.
摘要:
The invention relates to photochromic compounds of general formula (I), in which: R1-R8 represent various substituents, characterized in that at least two of the groups R3-R6 are C1-C6 alkoxy groups.